Low speed automatic cancellation

ACC is not functional at vehicle speeds below 16 mph (26 km/h). Once the vehicle speed drops below 16 mph (26 km/h), an audible alarm will sound and the automatic braking will be released.
See also:
Exceptions
There are several exceptions to the Normal Schedule. They are listed
below:
Normal vehicle axle maintenance: Rear axles and power take-off
(PTO) units with synthetic fluid and light-duty trucks e ...
Aluminum wheels and wheel covers
Aluminum wheels and wheel covers are coated with a clear coat paint
finish. In order to maintain their shine:
• Clean weekly with Motorcraft Wheel and Tire Cleaner, which is
available from your ...
Audio system–Navigation system based (if equipped)
If your vehicle is equipped with the navigation system, it will have an
integrated navigation/audio system. See the Navigation system
supplement for operating instructions on using this audio syst ...
